KVM: TDX: Handle TDX PV rdmsr/wrmsr hypercall

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Morph PV RDMSR/WRMSR hypercall to EXIT_REASON_MSR_{READ,WRITE} and
wire up KVM backend functions.

For complete_emulated_msr() callback, instead of injecting #GP on error,
implement tdx_complete_emulated_msr() to set return code on error.  Also
set return value on MSR read according to the values from kvm x86
registers.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Signed-off-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-ID: <20250227012021.1778144-10-binbin.wu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Isaku Yamahata 2025-02-27 09:20:10 +08:00 • committed by Paolo Bonzini

parent dd50294f3e

commit 081385dbc6

3 changed files with 35 additions and 1 deletions

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10

arch/x86/kvm/vmx/main.c

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24

arch/x86/kvm/vmx/tdx.c

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2

arch/x86/kvm/vmx/tdx.h

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